The FHO3000-D30 from Grandway Telecom is a Mini Optical Time Domain Reflectometer (OTDR) that operates at a wavelength of 1310 nm or 1550 nm. It has a measuring range above 100 km and dynamic range of 30 dB. This OTDR has an event dead zone of 1 m and attenuation dead zone of 5 m. It has a pulse width of 3 ns - 20 µs and linearity of ± 0.03 dB/dB. This OTDR has up to 128000 sampling points with a sampling resolution of 0.05 m and loss threshold of 0.01 dB. It has a distance resolution of 0.01 m and loss resolution of 0.001 dB. 

The FHO3000-D30 has an index of refraction of 1.2 - 1.7 and a memory capacity of 80000 groups curve. It has a 5-inch TFT-LCD touchscreen display and includes a power adapter, charge cord & lithium battery. This OTDR can be controlled via 2 type A USB and 1 micro USB interfaces and supports FC/LC/SC adapters. It has a visual fault locator that consumes 10 mW of power and an optical power meter with test range from -60 dBm to 5 dBm. This OTDR is available in a compact package that measures 195 mm x 141 mm x 44 mm.